The Swift(TM) 300 gives you more than enough lumens at our lightest weight for headlights (82 grams). NiteriderA(R) makes this headlight USB rechargeable for convenient on-the-go charging. FEATURES a Lumen Output: 300 a 5 Modes with Run Times: 2:00-28:00h a Charge Time: 2:00/3:15h a Low Battery Level Indicator a Weight: 82g a Water / Dust Resistant IP64 Rated a USB Rechargeable TYPICAL RUN TIMES a Low - 15:00h at 80 Lumens a Med - 9:00h at 150 Lumens a High - 2:00h at 300 Lumens a Flash - 12:00h at 300 Lumens a Walk - 28:00h at 20 Lumens